665243124466216 has 16 divisors (see below), whose sum is σ = 1255275640913940. Its totient is φ = 330502953555840.

The previous prime is 665243124466199. The next prime is 665243124466231. The reversal of 665243124466216 is 612664421342566.

It can be written as a sum of positive squares in 2 ways, for example, as 646234867322500 + 19008257143716 = 25421150^2 + 4359846^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 264826083325 + ... + 264826085836.

Almost surely, 2^{665243124466216} is an apocalyptic number.

It is an amenable number.

665243124466216 is a deficient number, since it is larger than the sum of its proper divisors (590032516447724).

665243124466216 is a wasteful number, since it uses less digits than its factorization.

665243124466216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529652169324 (or 529652169320 counting only the distinct ones).

The product of its digits is 59719680, while the sum is 58.

The spelling of 665243124466216 in words is "six hundred sixty-five trillion, two hundred forty-three billion, one hundred twenty-four million, four hundred sixty-six thousand, two hundred sixteen".